CO2 Dry ice not forming

[Greg66]

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

1. Create a stream with pure CO2; TV-flash with 0 liquid fraction @ 25°C
2. Property package: Ideal; Solid handling activated; Universal flash or SVLE (both give same result)
3. add a valve with 1 bar outlet pressure
4. Outlet stream consists of liquid and vapor phase @ -87°C. This is well below freezing point!

Expected behavior
Outlet stream of valve should consist of CO2 ice and vapor, but no liquid.

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• DWSIM Version v6.4.9

[Greg66]

For single component streams this was solved now by following commit: #161

Mixtures with multiple components need to be checked still -> SVLE flash

[andr1976]

Works for single component CO2 - Mixtures seems to be a pain still (DWSIM 7.3.2)